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Public Health

Flu Season Accelerates as H3N2 Subclade K Becomes Dominant in the U.S.

Officials urge vaccination to reduce severe disease despite a partial mismatch.

Flu Surges Nationwide as H3N2 Subclade K Dominates, Straining Hospitals Before Holidays

New H3N2 ‘Subclade K’ Drives Early Flu Surges as U.S. Officials Urge Vaccination